1. Bill Raun

2. OSU BS, 1979 OSU MS, 1982 University of Nebraska PHD, 1985
CIMMYT, Mexico, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, Panama, Haiti, Dominican Republic, Cuba OSU, Regents Professor, 1991-present 85 Thesis graduates 205 Refereed Publications 4 Classes Taught Wife, Tanya Raun Municipal Judge Business Law Professor 4 Children Anne, Notre Dame Kate, PA School Tulsa Chris, Freshman OSU Dana, Sophomore SHS

3. Hand Planters 3

5. EL SALVADOR

6. HONDURAS

7. Singulation Design

8. Reciprocating Drum Action
Drum rotates with the cavity moving back into the seed hopper as the spring is compressed.
Spring is fully compressed and the singulation drum cavity is exposed to seed in the hopper
Drum position when planter is relaxed.
As the force on the spring is released, the singulation drum rotates back to the initial ‘relaxed’ position and the seed is dropped.

9. seed size (2653-4344 seeds/kg) seed type, shape fertilizer
1,000,000 cycles
0.29g/seed
60,000 seeds/ha
3443 seeds/kg
1.0 kg hopper
17 times refill

10. INTERNAL DRUM Drum Mass (g) Volume (cm3) A 0.69 0.507 B 0.71 0.521 OS
0.88
0.646 OM
3.36
2.468 OC
3.38
2.482

12. Mid Season Fertilizer N
Combined, Efaw and Perkins, 2013
Topdress N, Corn, V12
70,000 plants/ha
Methods
N, kg/ha
Mg/ha
Check
6.6
Hand planter (0.9 g/plant) 30
11.2
Hand planter (1.8 g/plant) 60
10.6
Broadcast
6.4
7.0
Dribble urea
9.3
7.8
Dribble UAN
7.3
10.4
SED = 1.81

13. UGANDA

14. El Salvador, Hand Planter Trials, June, 2014

15. GreenSeeder Manual

16. “Food is the moral right of all who are born into this world.”
N.E. Borlaug